38638655 has 16 divisors (see below), whose sum is σ = 51037344. Its totient is φ = 27847680.

The previous prime is 38638651. The next prime is 38638657. The reversal of 38638655 is 55683683.

38638655 = 2³ + 3³ + ... + 111³.

It is a Cunningham number, because it is equal to 6216²-1.

It is not a de Polignac number, because 38638655 - 2² = 38638651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38638651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3107 + ... + 9323.

It is an arithmetic number, because the mean of its divisors is an integer number (3189834).

Almost surely, 2^38638655 is an apocalyptic number.

38638655 is a deficient number, since it is larger than the sum of its proper divisors (12398689).

38638655 is a wasteful number, since it uses less digits than its factorization.

38638655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6346.

The product of its digits is 518400, while the sum is 44.

The square root of 38638655 is about 6215.9999195624. Note that the first 4 decimals coincide. The cubic root of 38638655 is about 338.0705447796.

It can be divided in two parts, 38638 and 655, that added together give a palindrome (39293).

The spelling of 38638655 in words is "thirty-eight million, six hundred thirty-eight thousand, six hundred fifty-five".